package com.bdqn.util;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.FileOutputStream;
import java.io.IOException;

public class examples06 {
    public static void main(String[] args) {
        try {
            //得到DOM解析器的工厂实例
            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
            //从DOM工厂获得DOM解析器
            DocumentBuilder db = dbf.newDocumentBuilder();
            //解析XML文档,得到一个Document对象,即DOM树
            Document doc = db.parse("src/收藏信息");

            //找到修改的节点
            NodeList list = doc.getElementsByTagName("Brand");
            for (int i = 0; i < list.getLength(); i++) {
                Element brandElement = (Element) list.item(i);
                String brandName = brandElement.getAttribute("name");
                if (brandName.equals("SAMSUNG")) {
                    brandElement.getParentNode().removeChild(brandElement);    //修改属性
                }
            }

            //保存XML文件
            TransformerFactory transformerFactory = TransformerFactory.newInstance();
            Transformer transformer = transformerFactory.newTransformer();
            DOMSource domSource = new DOMSource(doc);
            //设置编码类型
            transformer.setOutputProperty(OutputKeys.ENCODING, "gb2312");
            StreamResult result = new StreamResult(
                    new FileOutputStream("src/收藏信息.xml")
            );
            //把DOM树转换为XML文件
            transformer.transform(domSource, result);
        } catch (ParserConfigurationException e) {
            e.printStackTrace();
        } catch (SAXException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TransformerException e) {
            e.printStackTrace();
        }
    }
}
